EP1623959B1 - PVA-zersetzendes Bakterium und Methode zur Zersetzung von PVA - Google Patents

PVA-zersetzendes Bakterium und Methode zur Zersetzung von PVA Download PDF

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Publication number
EP1623959B1
EP1623959B1 EP05016612A EP05016612A EP1623959B1 EP 1623959 B1 EP1623959 B1 EP 1623959B1 EP 05016612 A EP05016612 A EP 05016612A EP 05016612 A EP05016612 A EP 05016612A EP 1623959 B1 EP1623959 B1 EP 1623959B1
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EP
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Prior art keywords
bacteria
pva
decomposing
polyvinyl alcohol
bacterial
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English (en)
French (fr)
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EP1623959A1 (de
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Masayoshi Kojima
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Fujifilm Corp
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Fujifilm Corp
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used

Definitions

  • the present invention relates to decomposition and assimilation of polyvinyl alcohol (hereafter abbreviated as "PVA").
  • PVA is widely used for industrial applications as a water-soluble synthetic polymer. It is extensively employed as, for example, a starting material of a synthetic fiber or film, a fiber-processing agent, a paper-processing agent, an adhesive, a binder for inorganic substances, or a polymerization stabilizer for vinyl chloride resins.
  • PVA waste liquid has been heretofore considered to be a cause of elevated COD levels in wastewater, treatment of PVA waste liquid with microorganisms such as biological sludge has been examined, and decomposing bacteria have been searched for.
  • microorganisms that are known to be capable of decomposing PVA include Pseudomonas bacteria, Enterobacter bacteria, Acinetobacter bacteria, Corynebacterium bacteria, Rhodococcus bacteria, Caseobacter bacteria, and Sphingomonas bacteria (for example, JP Patent Publication (Kokoku) Nos. 55-1791 B (1980), 57-27713 B (1982), and 57-27714 B (1982) and JP Patent Publication (Kokai) Nos. 8-140667 A (1996), 7-108297 A (1995), and 2003-250527 A ).
  • Microorganisms that have been heretofore reported are bacteria that are independently capable of decomposing PVA and bacteria that are in need of symbiotic bacteria.
  • the object of the present invention is to provide PVA-decomposing bacteria that are independently highly capable of decomposing and assimilating various types of PVA and a method for decomposing and assimilating PVA with the utilization of such bacteria, and to provide a method for decomposing and assimilating PVA wherein microorganisms containing such bacteria exhibit a high level of PVA decomposing activity even in the presence of other nutrients, such as gelatin and starch, that are easily assimilable by microorganisms.
  • the present inventors have extensively searched for microorganisms in nature, such as in rivers, soil, and biological sludge. As a result, they have found that Comamonas testosteroni separated from biological sludge sampled from the Fuji Photo Film Fujinomiya Factory are highly capable of decomposing and assimilating PVA and use thereof enables efficient cleanup treatment of various types of PVA-containing wastes and the like. They have also found that even when nutrients such as gelatin and starch, which are easily assimilable by microorganisms, are present in wastes, the wastes can be effectively cleaned up while decomposition of PVA remains undelayed.
  • the present invention provides a method for decomposing polyvinyl alcohol which comprises bringing bacteria that belong to the genus Comamonas, microorganisms containing the same, or bacterial components thereof into contact with polyvinyl alcohol, wherein the bacterial components include cultured products of bacteria that belong to the genus Comamonas, immobilized bacteria, bacterial extracts, immobilized bacterial extracts, bacterial liquid extracts, culture solutions, and culture filtrates.
  • a method for decomposing polyvinyl alcohol which comprises bringing bacteria that belong to the species Comamonas testosteroni, microorganisms containing the same, or bacterial components thereof into contact with polyvinyl alcohol, wherein the bacterial components include cultured products of bacteria that belong to the genus Comamonas, immobilized bacteria, bacterial extracts, immobilized bacterial extracts, bacterial liquid extracts, culture solutions, and culture filtrates.
  • the bacteria that belong to the species Comamonas testosteroni are Comamonas testosteroni KSS-13 (accession number: FERM BP-10356).
  • the bacteria that belong to the species Comamonas testosteroni are Comamonas testosteroni KSS-13 (accession number: FERM BP-10356).
  • the present invention provides polyvinyl alcohol-decomposing bacteria which are deposited as Comamonas testosteroni KSS-13 (accession number: FERM BP-10356).
  • the present invention provides a method for decomposing polyvinyl alcohol which comprises immobilizing microorganisms containing Comamonas testosteroni KSS-13 (accession number: FERM BP-10356) on a carrier and bringing it into contact with polyvinyl alcohol or a polyvinyl alcohol derivative.
  • the bacteria-immobilized carrier is comprised of active carbons or crosslinked polymers.
  • Examples of PVA that is used in the present invention include PVA obtained by saponification of polyvinyl acetate. PVA can be decomposed and assimilated by using the bacteria of the present invention regardless of the degree of PVA polymerization or the degree of saponification, i.e., whether complete or partial saponification is involved.
  • Examples of highly degradable PVA include those having a degree of polymerization of 300 to 3,500 and a degree of saponification of 86% to 99%.
  • Examples of PVA derivatives include anionic PVA and terminal hydrophobic PVA.
  • the bacteria that are capable of decomposing and assimilating polyvinyl alcohol according to the present invention belong to the genus Comamonas, and are preferably strains which belong to the species Comamonas testosteroni .
  • the genus Comamonas which is capable of decomposing and assimilating polyvinyl alcohol, has been extensively searched for in nature. For example, it can be separated in the following manner.
  • the genus Comamonas which is capable of decomposing and assimilating polyvinyl alcohol according to the present invention is separated, for example, in the following manner. Specifically, samples such as those from rivers, biological sludge, soil, marine water or lake water are filtered through a membrane filter (pore diameter: 0.1 ⁇ m to 0.5 ⁇ m), and the membrane filter is soaked in a PVA liquid medium and subjected to shaking culture to evaluate the presence of PVA-decomposing bacteria. Thereafter, the culture solution is dispersed on an adequate medium to form colonies. The resulting colonies are inoculated on a low nutrient medium containing PVA, and bacteria capable of decomposing PVA may be selected and then separated.
  • a membrane filter pore diameter: 0.1 ⁇ m to 0.5 ⁇ m
  • An example of the bacteria capable of decomposing and assimilating PVA and derivatives thereof according to the present invention is Comamonas testosteroni KSS-13 strain.
  • This Comamonas testosteroni KSS-13 strain is deposited at the International Patent Organism Depositary of the National Institute of Advanced Industrial Science and Technology (Tsukuba Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki, Japan) as of June 16, 2004, under the accession number FERM P-20082, and was transferred to International deposition under Budapest treaty as of June 23, 2005 under the accession number FERM BP-10356.
  • Mycological properties and the results of genetic analysis of the Comamonas testosteroni KSS-13 are described below.
  • the KSS-13 strain was inoculated on LB agar medium, DNA was extracted from a culture product at 30°C, the extracted DNA was amplified by PCR, and the PCR product was purified. Thereafter, cycle sequencing was carried out using the BigDyeTM Terminator v. 3.1 (Applied Biosystems) to determine the nucleotide sequence of 16 SrDNA, and 16 SrDNA was analyzed using the FASTA Program of the DNA Data Bank of Japan (http://www.ddbj.nig.ac.jp/) on the web.
  • the 16 SrDNA of the KSS-13 strain of the present invention was found to have 97.7% homology to that of Comamonas testosteroni (DDBJ/EMBL/GenBank databases direct submittion. Accession No.AB007416).
  • bacteria are cultured in accordance with, for example, a culture technique for microorganisms that belong to the genus Comamonas.
  • bacteria are preferably cultured under aerobic conditions, such as with shaking culture via liquid culture or aeration agitation culture.
  • a variety of synthetic media, semi-synthetic media, naturally-occurring media, and the like for aerobic bacteria can be employed for culture. Examples thereof include meat extract and peptone.
  • the pH level of a medium is preferably between 6 and 8.
  • the culture temperature is preferably kept at a temperature where the genus Comamonas is grown well. This is generally about 15°C to 42°C, and particularly preferably about 25°C to 38°C.
  • a culture period is generally for 2 days to 1 week under aerobic conditions regardless of the type of culture conducted, i.e., whether liquid shaking culture or aeration agitation culture is employed. It should be noted that such culture conditions can be adequately altered depending on the types and properties of microorganisms to be used, external conditions, and other conditions.
  • bacteria according to the present invention can effectively decompose and assimilate PVA as described in the Examples below. Accordingly, bacteria that belong to the genus Comamonas (for example, Comamonas testosteroni), microorganisms containing the same, or bacterial components thereof can be brought into contact with industrial wastes, such as household effluents, industrial effluents, or waste liquids, or PVA-containing substances such as soil, to clean up them.
  • the bacterial components include cultured products of bacteria that belong to the genus Comamonas , immobilized bacteria, bacterial extracts, immobilized bacterial extracts, bacterial liquid extracts, culture solutions, and culture filtrates. Examples of carriers that can be used for immobilizing bacteria include active carbons and crosslinked polymers.
  • Examples of methods for decomposing PVA with the utilization of the microorganisms according to the present invention in the case of wastewater cleanup include a means for installing a processor having the genus Comamonas of the present invention or microorganisms containing the same immobilized thereon, at individual sources, and a means for adding the bacteria of the present invention or microorganisms containing the same to an activated sludge tank or the like in a wastewater plant.
  • An example of such method in the case of soil cleanup is a means for applying the bacteria of the present invention or microorganisms containing the same to soil.
  • a means for applying the bacteria of the present invention or microorganisms containing the same to river or lake in nature can be employed.
  • Such PVA decomposition treatment is carried out at a pH 4 to 10 and preferably pH 5 to 8, and at a processing temperature of 5°C to 40°C and preferably of 15°C to 35°C, for 0.5 hour to 14 days in general and preferably for 1 hour to 7 days.
  • PVA medium 100 ml of PVA medium (Table 1) was prepared, wild-type E . coli MG1655 strain having no PVA decomposition ability was inoculated in order to remove impurities contained in PVA used as a starting material, such as acetate, and shaking culture was carried out at 30°C for overnight.
  • the culture solution was filtered through a membrane filter (pore diameter: 0.2 ⁇ m) for sterilization.
  • a suspension of PVA waste sludge 50 ⁇ l was inoculated on the filtered culture medium, and shaking culture was carried out at 30°C for 10 days.
  • Example 2 Decomposition and assimilation of PVA utilizing Comamonas testosteroni KSS-13 strain
  • KSS-13 strains grown in an LB agar medium were inoculated on 10 ml of 0.5% PVA medium using an inoculating loop, and shaking culture was carried out at 28°C for 8 days. Part of the culture solution was removed with the elapse of time, and turbidity (OD 600) and PVA concentration thereof were measured.
  • PVA concentration was measured in accordance with the method described in Kim, B. C., C. K. Sohn, S. K. Lim, J. W. Lee, and W. Park, 2003, Degradation of polyvinyl alcohol by Sphingomonas sp. SA3 and its symbiote, J. Ind. Microbiol. Biotechnol., 30, 70-74 . As a result, it was shown that the KSS-13 strain was capable of effectively decomposing PVA by itself ( Fig.1 ).
  • the method for decomposing PVA according to the present invention is effective for decomposition and assimilation of PVA in the clean up and composting treatment of various forms of wastewater, waste liquid soil, and the like.

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (7)

  1. Verfahren zum Abbau von Polyvinylalkohol, 1 das das Inkontaktbringen von Bakterien, die zum Genus Comamonas gehören, von Mikroorganismen, 1 die diese enthalten, oder von bakteriellen Komponenten davon mit Polyvinylalkohol umfasst, wobei die bakteriellen Komponenten Kulturprodukte von Bakterien, die zum Genus Comamonas gehören, immobilisierte Bakterien, bakterielle Extrakte, immobilisierte bakterielle Extrakte, bakterielle flüssige Extrakte, Kulturflüssigkeiten und Kulturfiltrate einschließen.
  2. Verfahren gemäß Anspruch 1, wobei die Bakterien, die zum Genus Comamonas gehören, Bakterien von der Spezies Comamonas testosteroni, Mikroorganismen, die diese enthalten, oder bakterielle Komponenten davon sind, wobei die bakteriellen Komponenten Kulturprodukte von Bakterien, die zum Genus Comamonas gehören, immobilisierte Bakterien, bakterielle Extrakte immobilisierte bakterielle Extrakte, bakterielle flüssige Extrakte, Kulturflüssigkeiten und Kulturfiltrate einschließen.
  3. Verfahren gemäß Anspruch 1 oder 2, wobei die Bakterien, die zur Spezies Comamonas testosteroni gehören, Comamonas testosteroni KSS-13 (Hinterlegungsnummer: FERM BP-10356) sind.
  4. Verfahren gemäß einem der vorangegangenen Ansprüche, wobei Polyvinylalkohol in Abwasser, flüssigem Abfall oder Boden enthalten ist.
  5. Verfahren gemäß einem der vorangegangenen Ansprüche, wobei die Mikroorganismen, die Comamonas testosteroni KSS-13 (Hinterlegungsnummer: FERM BP-10356) enthalten, auf einem Träger immobilisiert sind.
  6. Verfahren gemäß Anspruch 5, wobei der Bakterienimmobilisierende Träger Aktivkohlen oder quervernetzte Polymere umfasst.
  7. Polyvinylalkohol-abbauende Bakterien, die als Comamonas testosteroni KSS-13 (Hinterlegungsnummer: FERM BP-10356) hinterlegt sind.
EP05016612A 2004-07-30 2005-07-29 PVA-zersetzendes Bakterium und Methode zur Zersetzung von PVA Active EP1623959B1 (de)

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JP2004223953A JP2006042611A (ja) 2004-07-30 2004-07-30 Ｐｖａ分解菌及びｐｖａの分解方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11859229B2 (en) 2017-03-02 2024-01-02 Hayashibara Co., Ltd. Polyvinyl alcohol-degrading enzyme and process for producing the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102627822B (zh) * 2012-04-17 2013-07-31 合肥工业大学 一种改性pva-淀粉控释碳源材料及其制备方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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JPS51128472A (en) * 1975-04-25 1976-11-09 Kuraray Co Ltd Process for assimilating and decomposing polyvinyl alcohol by the use of microorganisms
DE19608319C1 (de) * 1996-02-22 1997-04-10 Ufz Leipzighalle Gmbh Bakterienstamm Comamonas acidovorans P4a und Verfahren zur mikrobiellen Dekontamination von mit Phenoxyessigsäure-Herbiziden belasteten Materialien
DE19845784C1 (de) * 1998-09-21 2000-02-17 Ufz Leipzighalle Gmbh Bakterienstamm Comamonas testosteroni MC1 und Verfahren zur mikrobiellen Dekontamination von mit Phenoxy-Herbiziden belasteten Materialien
JP4693325B2 (ja) * 1999-11-19 2011-06-01 マイクロテック・メディカル・ホールディングズ・インコーポレイテッド 水溶性ポリマーを含有する廃棄物流の処理方法およびシステム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11859229B2 (en) 2017-03-02 2024-01-02 Hayashibara Co., Ltd. Polyvinyl alcohol-degrading enzyme and process for producing the same

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EP1623959A1 (de) 2006-02-08
DE602005023564D1 (de) 2010-10-28
ATE481361T1 (de) 2010-10-15
JP2006042611A (ja) 2006-02-16

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